Science

5 09, 2017

History of engineering – transportation, cooking, metal

By |2018-04-19T11:10:59-07:00September 5th, 2017|Science|Comments Off on History of engineering – transportation, cooking, metal

A Neanderthal stone awl People have been using engineering to solve the problems of their daily lives since the first caveman picked up a rock and chipped away at it to make a handaxe. [...]

5 09, 2017

History of astronomy – Science and space

By |2019-02-04T15:14:58-08:00September 5th, 2017|Science|Comments Off on History of astronomy – Science and space

A starry sky with the Milky Way galaxy(thanks to Bernd Nies) Early astronomy The very earliest people, as early as six million years ago, knew much more about the moon and the planets and the stars than most [...]

4 09, 2017

Ptolemy – Roman astronomy – history of science

By |2018-04-11T09:22:19-07:00September 4th, 2017|Romans, Science|Comments Off on Ptolemy – Roman astronomy – history of science

A copy of Ptolemy's map of the world Ptolemy was born in Egypt in about 90 AD, when the Romans were ruling Egypt. He was a Roman citizen. Probably he was the son or grandson of [...]

4 09, 2017

Roman numerals – Ancient Roman numbers

By |2017-09-04T18:16:56-07:00September 4th, 2017|Math, Romans, Science|Comments Off on Roman numerals – Ancient Roman numbers

Claudia Pieris' tombstone (CIL VI.15543) She lived 117-138 AD. Now in Copenhagen, at the Ny Carlsberg Glyptotek. The Romans used several different systems for writing numbers. Sometimes they wrote numbers [...]

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